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### Question

Karmjeet and Sham are friends. What is the probability that both will have different birthdays, ignoring a leap year?

**A**

${364/365}$.

**B**

$21/365$.

**C**

$365/365$.

**D**

$369/365$.

**Soln.**

**Ans: a**

The birthday of second friend has 365 outcomes. If it is not to match the birthday of the first friend, the number of favorable outcomes is 365 - 1 = 364. So probability is 364/365.